RWDI
Website verified August 2026
- Engineering & EPCM
- Environmental Services
- Mining Consultants
- Asia
- Australia
- Europe
- Middle East
- North America
- United Kingdom
- Worldwide
Key takeaways
- Category: Engineering & EPCM, Environmental Services, Mining Consultants
- Based in: Guelph Ontario Canada, Milton Keynes Buckinghamshire United Kingdom, Trivandrum Kerala India and 32 more locations
- Serves: Asia, Australia, Europe, Middle East, North America, United Kingdom, Worldwide
- Operating: Founded 1972
- Certified: LEED Gold certifications for offices including LEED EB Gold for Guelph headquarters, LEED EB Gold for Trivandrum India…
RWDI is a leading global climate and performance engineering consulting firm with 800+ employees across 32 offices worldwide. The firm provides technical expertise across multiple disciplines to design and deliver resilient projects optimized for high-performance and integrated within their surrounding environment, ensuring safety, comfort, and sustainability.
Founded in 1972 as MHTR by Bill Rowan, Jim Burgess and Frank Theakston, the firm evolved through key milestones including the 1986 formation of Rowan Williams Davies and Irwin, Inc. (RWDI) following a senior partner buyout of the Guelph microclimate division of Morrison Hershfield. RWDI has completed over 40,000 projects and maintains a commitment to creating harmony between the built and natural environment through climate and performance engineering, a approach to addressing complex engineering and environmental challenges in the built environment that ensures projects are tailored to their specific climate, enhancing efficiency, sustainability, comfort, and resilience against natural disasters.
The firm operates global Climate Labs, making RWDI the only engineering consulting firm globally with full-scale Climate Labs including world-renowned wind tunnels and pioneering water flumes. These facilities enable clients to replicate and plan for real-world conditions. RWDI Ventures is the company’s startup incubator, developing innovative standalone products and technology companies that uses decades of experience and assets, including the CFD software solution Orbital Stack launched in 2020.
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Company details
- Projects and clients
- 22 Bishopsgate London, HS2 Chiltern Tunnels, Single-Axis Solar Tracker Manufacturing, Mangoola Coal Mine, BC Hydro Site C Clean Energy Project, Grand Canyon Skywalk, Bell Canada Tower Montreal Quebec (first aeroelastic wind load study 1980), York Adelaide Tower (first wind cladding study 1978), Alex Fraser Bridge Annacis Island BC (first wind tunnel study for long-span bridge 1981, first aeroelastic study on a bridge 1983), Oregon Convention Center (tuned mass damper installation 1998), Lynnwood Highschool USA, Sarah McLachlan School of Music Canada, LUMA Foundation The Tower Europe and United Kingdom, Vale Copper Cliff Mining Operations Canada, EverWind Canada
- Scale
- 800+ global employees, 32 offices, 40,000+ projects completed, over 50 years of company history since 1972
- Also worth knowing
- RWDI Ventures launched Orbital Stack CFD software in 2020 as a digital tool to complement consulting practice; founding partner Peter Irwin was a wind engineering pioneer; first exhaust dispersion study conducted 1981; first pedestrian-level wind study conducted 1975; first wind cladding study conducted 1978; first tuned mass damper study and installation at Oregon Convention Center 1998; RWDI AIR Inc. established 1999 as dedicated environmental services team; Motioneering launched 2000 as consulting practice for supplementary damping systems with hundreds of installations globally; Virtualwind Inc. formed 2005 in Calgary to develop CFD software for wind simulation in outdoor environments; GHG verification service developed 2014 to help clients meet climate change regulatory requirements; ranked Canada's Best Managed Companies 17 years in succession (through 2025); third LEED Gold Certification announced 2024; employees contributed $207,300 collectively through RWDI GIVES corporate giving programs
Details prepared by MineListings. RWDI can update them by upgrading to Premium.
Where is RWDI listed in the directory?
Engineering & EPCM 155 companies Environmental Services 474 companies Mining Consultants 277 companiesFrequently asked questions
What does RWDI supply?
Air quality testing and analysis, building sciences, building enclosures, building envelope and façade consulting, computational fluid dynamics (CFD) modeling, daylighting analysis, dispersion modeling, extended producer responsibility consulting, exhaust dispersion studies, geoscience analysis, greenhouse gas emissions accounting and consulting, greenhouse gas verification, land use consulting, mechanical and natural ventilation and indoor air quality strategies, noise and vibration, odor assessment, pedestrian-level wind studies, precipitation management, risk management, regulatory permitting, solar studies, stack effect analysis, structural dynamics analysis, sustainable buildings consulting, tuned mass damper design and installation, urban design and master planning, wind cladding studies, wind engineering
Where is RWDI based?
Guelph Ontario Canada, Milton Keynes Buckinghamshire United Kingdom, Trivandrum Kerala India, Calgary Alberta Canada, Los Angeles California USA, Philadelphia Pennsylvania USA, Portland Oregon USA, Toronto Ontario Canada, Vancouver British Columbia Canada, Kuala Lumpur Selangor Malaysia, London United Kingdom, New York New York USA, Milan Italy, Sydney New South Wales Australia, Dubai United Arab Emirates, Hong Kong, Shanghai China, Singapore, Brighton East Sussex United Kingdom, Brisbane Queensland Australia, Perth Western Australia Australia, Detroit Michigan USA, Miami Florida USA, Ottawa Ontario Canada, Victoria British Columbia Canada, Fort St. John British Columbia Canada, London Ontario Canada, Sarnia Ontario Canada, Thunder Bay Ontario Canada, Windsor Ontario Canada, Mumbai India, Emeryville California USA, Seattle Washington USA, Melbourne Victoria Australia, Dublin Ireland
Which industries does RWDI work in?
Buildings and facilities, civic and cultural, commercial and residential, education, entertainment and hospitality, healthcare, stadiums and sports, transportation and urban planning, airports, bridges, ports, rail and transit, roads and tunnels, waste management, manufacturing, mining and quarrying, oil and gas, renewable energy, iconic structures
What equipment or products does RWDI offer?
Orbital Stack CFD software, wind tunnels, water flumes, proprietary software, advanced modelling tools
How long has RWDI been operating?
Founded 1972, formed as MHTR by Bill Rowan, Jim Burgess and Frank Theakston; 1986 formation of Rowan Williams Davies and Irwin, Inc. (RWDI)
What certifications does RWDI hold?
LEED Gold certifications for offices including LEED EB Gold for Guelph headquarters, LEED EB Gold for Trivandrum India office, LEED CI Gold for Portland USA office; ISO 14065 accreditation (accreditation ID#1053 by ANAB); staff accreditations including WELL AP, LEED AP, Sustainability Facility Professional (SFP), Certified Passive House Consultant; Canada's Best Managed Companies for 17th straight year in 2025; third LEED Gold Certification announced 2024, ISO 14064
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